using System;
using System.Collections;
using iTextSharp.text;
using iTextSharp.text.pdf;
/*
 * $Id: PdfPageEventForwarder.cs,v 1.2 2008/05/13 11:25:40 psoares33 Exp $
 * 
 *
 * Copyright 2005 Bruno Lowagie
 *
 * The contents of this file are subject to the Mozilla Public License Version 1.1
 * (the "License"); you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the License.
 *
 * The Original Code is 'iText, a free JAVA-PDF library'.
 *
 * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
 * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
 * All Rights Reserved.
 * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
 * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
 *
 * Contributor(s): all the names of the contributors are added in the source code
 * where applicable.
 *
 * Alternatively, the contents of this file may be used under the terms of the
 * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
 * provisions of LGPL are applicable instead of those above.  If you wish to
 * allow use of your version of this file only under the terms of the LGPL
 * License and not to allow others to use your version of this file under
 * the MPL, indicate your decision by deleting the provisions above and
 * replace them with the notice and other provisions required by the LGPL.
 * If you do not delete the provisions above, a recipient may use your version
 * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the MPL as stated above or under the terms of the GNU
 * Library General Public License as published by the Free Software Foundation;
 * either version 2 of the License, or any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
 * details.
 *
 * If you didn't download this code from the following link, you should check if
 * you aren't using an obsolete version:
 * http://www.lowagie.com/iText/
 */

namespace iTextSharp.text.pdf.events {

    /**
    * If you want to add more than one page eventa to a PdfWriter,
    * you have to construct a PdfPageEventForwarder, add the
    * different events to this object and add the forwarder to
    * the PdfWriter.
    */

    public class PdfPageEventForwarder : IPdfPageEvent {

        /** ArrayList containing all the PageEvents that have to be executed. */
        protected ArrayList events = new ArrayList();
        
        /** 
        * Add a page eventa to the forwarder.
        * @param eventa an eventa that has to be added to the forwarder.
        */
        public void AddPageEvent(IPdfPageEvent eventa) {
            events.Add(eventa);
        }
        
        /**
        * Called when the document is opened.
        * 
        * @param writer
        *            the <CODE>PdfWriter</CODE> for this document
        * @param document
        *            the document
        */
        public virtual void OnOpenDocument(PdfWriter writer, Document document) {
            foreach (IPdfPageEvent eventa in events) {
                eventa.OnOpenDocument(writer, document);
            }
        }

        /**
        * Called when a page is initialized.
        * <P>
        * Note that if even if a page is not written this method is still called.
        * It is preferable to use <CODE>onEndPage</CODE> to avoid infinite loops.
        * 
        * @param writer
        *            the <CODE>PdfWriter</CODE> for this document
        * @param document
        *            the document
        */
        public virtual void OnStartPage(PdfWriter writer, Document document) {
            foreach (IPdfPageEvent eventa in events) {
                eventa.OnStartPage(writer, document);
            }
        }

        /**
        * Called when a page is finished, just before being written to the
        * document.
        * 
        * @param writer
        *            the <CODE>PdfWriter</CODE> for this document
        * @param document
        *            the document
        */
        public virtual void OnEndPage(PdfWriter writer, Document document) {
            foreach (IPdfPageEvent eventa in events) {
                eventa.OnEndPage(writer, document);
            }
        }

        /**
        * Called when the document is closed.
        * <P>
        * Note that this method is called with the page number equal to the last
        * page plus one.
        * 
        * @param writer
        *            the <CODE>PdfWriter</CODE> for this document
        * @param document
        *            the document
        */
        public virtual void OnCloseDocument(PdfWriter writer, Document document) {
            foreach (IPdfPageEvent eventa in events) {
                eventa.OnCloseDocument(writer, document);
            }
        }

        /**
        * Called when a Paragraph is written.
        * <P>
        * <CODE>paragraphPosition</CODE> will hold the height at which the
        * paragraph will be written to. This is useful to insert bookmarks with
        * more control.
        * 
        * @param writer
        *            the <CODE>PdfWriter</CODE> for this document
        * @param document
        *            the document
        * @param paragraphPosition
        *            the position the paragraph will be written to
        */
        public virtual void OnParagraph(PdfWriter writer, Document document,
                float paragraphPosition) {
            foreach (IPdfPageEvent eventa in events) {
                eventa.OnParagraph(writer, document, paragraphPosition);
            }
        }

        /**
        * Called when a Paragraph is written.
        * <P>
        * <CODE>paragraphPosition</CODE> will hold the height of the end of the
        * paragraph.
        * 
        * @param writer
        *            the <CODE>PdfWriter</CODE> for this document
        * @param document
        *            the document
        * @param paragraphPosition
        *            the position of the end of the paragraph
        */
        public virtual void OnParagraphEnd(PdfWriter writer, Document document,
                float paragraphPosition) {
            foreach (IPdfPageEvent eventa in events) {
                eventa.OnParagraphEnd(writer, document, paragraphPosition);
            }
        }

        /**
        * Called when a Chapter is written.
        * <P>
        * <CODE>position</CODE> will hold the height at which the chapter will be
        * written to.
        * 
        * @param writer
        *            the <CODE>PdfWriter</CODE> for this document
        * @param document
        *            the document
        * @param paragraphPosition
        *            the position the chapter will be written to
        * @param title
        *            the title of the Chapter
        */
        public virtual void OnChapter(PdfWriter writer, Document document,
                float paragraphPosition, Paragraph title) {
            foreach (IPdfPageEvent eventa in events) {
                eventa.OnChapter(writer, document, paragraphPosition, title);
            }
        }

        /**
        * Called when the end of a Chapter is reached.
        * <P>
        * <CODE>position</CODE> will hold the height of the end of the chapter.
        * 
        * @param writer
        *            the <CODE>PdfWriter</CODE> for this document
        * @param document
        *            the document
        * @param position
        *            the position of the end of the chapter.
        */
        public virtual void OnChapterEnd(PdfWriter writer, Document document, float position) {
            foreach (IPdfPageEvent eventa in events) {
                eventa.OnChapterEnd(writer, document, position);
            }
        }

        /**
        * Called when a Section is written.
        * <P>
        * <CODE>position</CODE> will hold the height at which the section will be
        * written to.
        * 
        * @param writer
        *            the <CODE>PdfWriter</CODE> for this document
        * @param document
        *            the document
        * @param paragraphPosition
        *            the position the section will be written to
        * @param depth
        *            the number depth of the Section
        * @param title
        *            the title of the section
        */
        public virtual void OnSection(PdfWriter writer, Document document,
                float paragraphPosition, int depth, Paragraph title) {
            foreach (IPdfPageEvent eventa in events) {
                eventa.OnSection(writer, document, paragraphPosition, depth, title);
            }
        }

        /**
        * Called when the end of a Section is reached.
        * <P>
        * <CODE>position</CODE> will hold the height of the section end.
        * 
        * @param writer
        *            the <CODE>PdfWriter</CODE> for this document
        * @param document
        *            the document
        * @param position
        *            the position of the end of the section
        */
        public virtual void OnSectionEnd(PdfWriter writer, Document document, float position) {
            foreach (IPdfPageEvent eventa in events) {
                eventa.OnSectionEnd(writer, document, position);
            }
        }

        /**
        * Called when a <CODE>Chunk</CODE> with a generic tag is written.
        * <P>
        * It is usefull to pinpoint the <CODE>Chunk</CODE> location to generate
        * bookmarks, for example.
        * 
        * @param writer
        *            the <CODE>PdfWriter</CODE> for this document
        * @param document
        *            the document
        * @param rect
        *            the <CODE>Rectangle</CODE> containing the <CODE>Chunk
        *            </CODE>
        * @param text
        *            the text of the tag
        */
        public virtual void OnGenericTag(PdfWriter writer, Document document,
                Rectangle rect, String text) {
            foreach (IPdfPageEvent eventa in events) {
                eventa.OnGenericTag(writer, document, rect, text);
            }
        }
    }
}